Pick-finder device for looms.



S. S. JACKSON.

PICK FINDER DEVICE FOR LOOMS. APPLIOATION FILED MAYQ, 1910.

Patented Mar. 26, 1912.

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S. S. JACKSON.

PIOK FINDER DEVICE FOR LOOMS. APPLICATION FILED MAY 9, 1910.

Patented Mar. 26, 1912.

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COLUMBIA PLANOURAPN CO., WASHINGTON, D. C.

S. S. JACKSON.

PIOK FINDER DEVICE FOR LOOMS.

Patented Mar. 26, 1912.

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APPLICATION FILED MAYQ, 1910.

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M y torney COLUMBIA PLANOGRAYPN C0-- WASHINOTON. D. C-

S. S. JACKSON.

PICK FINDER DEVICE FOR LOOMS.

APPLICATION FILED MAYQ, 1910. Patented Mar. 26, 1912.

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S. S. JACKSON.

PICK FINDER DEVICE FOR LOOMS.

' APPLICATION FILED MAY 9, 1910. 1,021 1 51 Patented Mar. 26, 1912.

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SIMEON SCHOON JACKSON, OF READVILLE, MASSACHUSETTS, ASSIGNOR TO THE STAFFORD COMPANY, OF RE-ADVILLE, MASSACHUSETTS, A CORPORATION OF NEW JERSEY.

PICK-FINDER DEVICE FOR LOOMS.

Specification of Letters Patent.

Application filed May 9, 1910.

Patented Mar. 26, 1912.

Serial No. 560,322.

To all whom it may concern:

Be it known that I, SIMEON SOHOON JACK- soN, a subject of Great Britain, residing at Readville, in the county of Norfolk, State of Massachusetts, have invented a certain new and useful Improvement in Pick- Finder Devices for Looms, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention comprises novel pick-finder or pick-matching devices for looms employing dobbies or other similar shedding mechanisms having pattern-chains or other pattern-carriers with successive lines of pattern-indicators, for operating the harnessframes to form the sheds in the warp-thread for the production of the desired weaves or patterns.

The invention is designed more especially for application to. looms equipped with means for replenishing the working weftsupply at one side of the loom, and in which the replenishment is effected at such side automatically on failure of the working weft, ascertained by the weft-detector devices; but is applicable also to looms in which replenishment is effected manually, after the working of the loom has been arrested through the action of the weft-detector devices, with the shuttle always at the same side thereof.

In looms in general, unless the first flight of the shuttle after replenishment (either automatic or manual) is made through a re opening of the shed in which weft-absence first occurred, a defect in the cloth being woven, in the nature of a break in the weave or pattern of the latter, will result from absence of a partial pick of weft or of one or more picks at the place where the failure of weft occurred.

The purpose of the invention is to obviate defects of this character. This purpose I accomplish by providing means for automatically resetting the pattern-devices of the dobby or similar shedding mechanism to effect the reopening of the shed in which the weft-failure took place, for the reception of the first pick of weft after replenishment, in whichever direction of pick the weft-absence first occurred.

The invention is applicable in connection with both of the forms of automatic weftreplenishing mechanisms at present in use, namely, those in which replenishment is effected by making a change of shuttle, and those in which it is effected by making a change of bobbin or other weft-carrier without changing the shuttle. It also is applicable equally to looms in which the weaving action is suspended for the automatic replenishment, the weaving instrumentalities remaining at rest until after replenishment and being then automatically caused to resume their regular operation, and to those in which automatic replenishment takes place without suspension of the operation of the weaving instrumentalities.

WVeft-failure may take place on the pick of the shuttle in either direction, but the weft-fork which is employed in a loom for the detection of weft-failure is located, usually, at one side of the loom. In a loom effecting replenishment automatically the weft-fork usually is located at the side opposite that at which the magazine and coacting parts for eficcting replenishment are located. The detecting action of the weftfork takes place on the pick of the shuttle toward the side at which it is placed. If weft-failure occurs on that pick the weft.- fork will at once detect it. If, however. it occurs on the pick from the weft-fork side of the loom toward the other side, the weftabsence will not be detected until the subsequent pick returning the shuttle to the weftfork side. To this latter fact is due the failure to secure entirely satisfactory results with the pick-finder or pick-matching devices heretofore proposcd for use in connection with loom (lobbies. These devices have comprised resetting devices for the pattern cylinder and pattern chain arranged to turn the same backward always the same number of lines of indicaters, usually two, for the resetting. In the operation thereof, if weft-failure occurs in the pick of the shuttle toward the side of the loom at which the weft-fork is located, the weft-fork will at once detect the said weft-failure and in the case of a replenishing loom will call the replenishing devices into action to efl'ect replenishment after the return pick of the shuttle from the weft-fork side of the loom to the replenishing side. In an ordinary loom it will actuate the stopping device to stop the loom with the shuttle at rest at the predetermined side thereof; The resetting devices will also turn back the pattern-cylinder and patternturned back to the extent of two lines of indicators, the proper line of indicators to bring about a reopening of the shed in which weft-absence first occurred will be brought into action again thereby, and the said shed will be reopened to receive the first pick of fresh weft following the auto matic replenishment. In case, however, the weft-failure should occur in the pick of the shuttle from the weft-fork side of the loom toward the opposite side, no detecting action will occur on such pick. Such action will take place after the return pick to the weftfork side, and then the resetting devices will be called into action, but another pick from the weft-fork side will take place before the replenishing devices act, making a series of three picks, instead of the two in the first instance. l/Vith resetting devices acting to turn back the pattern-cylinder and pattern-chain to the extent of two lines of pattern-indicators only, the proper line of indicators for causing a reopening of the shed in which weft-absence occurred will not be returned into action. The next succeeding line of indicators, instead, will be brought into action. Consequently, the shed next subsequent to the right one will be reopened, and will receive the first pick of fresh weft after replenishment. The shed in which weft-absence first occurred will remain either partially or wholly unoccupied by weft, and a break will appear in the sequence of the weave or pattern of the cloth. Similar results will occur, also, in an ordinary loom in which the loom is stopped by the action of the weft-fork, replenishment effected by hand, and the loom restarted by the weaver, unless the weaver in the case in which the number of picks intervening before stoppage, beginning with that in which weft-failure occurred, exceeds the number of lines the pattern-chain is turned backward, effects a supplementary adjustment of the pattern-chain by hand, moving it back an additional line of indicators. The pick-finder or pick-matching devices in question will therefore not act automatically to obviate breaks in the sequence of the pattern or weave of the cloth being woven, in the case of more than onehalf of the weft-failures that take place. So far as I am aware, none of the forms of pick-finding or pick-matching devices heretofore proposed for use in connection with loom-dobbies is adapted for the production of cloth entirely free from such defects, in a loom in which replenishment of the working weft-supply is effected automatically.

Pick-finder or pick-matching devices employing weft-detector devices at both sides of the loom have been arranged to always turn back the pattern-cylinder and patternchain the same number of lines of patternindicators each time weft-absence is detected at either side of the loom, and have been adapted to bring about in each case a re opening of the shed in which weft-absence first occurred. However, in the case of failure of weft in one direction of pick the loom is stopped through the action of the said weft-detector devices with the shuttle at one side of the loom, while in case of failure in the other direction of pick the loom is stopped with the shuttle at the other side thereof. Devices thus operating are not adapted for use in combination with replen ishing devices which effect replenishment automatically at one side of the loom only, or for employment in a non-replenishing loom in which the loom is required to be stopped by the action of the Weft-detector devices with the shuttle always at the same side of the loom. In carrying my invention into effect employ weft-detecting devices operative to detect weft-absence for picks in both directions across the loom, a dobby or other shedding mechanism employing a pattern-chain or other pattern-carrier having successive lines of patternindicators, weftreplenishing instrumentalities controlled by the said detecting devices and effecting replenishment at one side of the loom, and pick-finder devices controlling the said dobby or other fected without arrest of the weaving, as well as with those of the class in which a suspension of the weaving action takes place until after replenishment has been effected, the weaving action being then automatically resumed. A loom of this latter class is shown and described in United States Letters Patent to me No. 945,722, dated January 4, 1910. One phase of my invention, therefore, involves the employment, in combination, of detecting devices operative to detect weft-absence for picks in both directions, loom-stopping devices which bring the weaving instrumentalities to rest with the shuttle always at the same side of the loom, a dobby or other shedding mechanism employing a pattern-chain or other pattern carrier having successive lines of pattern indicators, and pick-finder devices controlling the said dobby or other shedding mechanism to reopen, for the first pick after restarting, the shed in which weft-absence first occurred. As the preferred embodiment of my invention I have shown a construction employing a singleindex dobby. However, I believe myself to be the first to combine, in a loom in which weft-replenishment is effected automatically at one side thereof, weft-detecting devices operative to detect weft-absence for picks in both directions across the loom, a dobby or other shedding mechanism using a pattern-chain or other pattern-carrier having successive lines of pattern-indicators, weft-replenishing instrumentalit-ies controlled by the said detecting devices and effecting replenishment at one side of the loom, and pick-finder or pick-matching devices controlling the said dobby or other like shedding mechanism to reopen for the first pick following replenishment the shed in which Weft-absence first occurred. My invention, therefore, is not necessarily restricted to any particular construction of mechanism embodying the characteristic principles thereof.

An embodiment of the invention in the form in which I have employed the same in a. loom effecting weft-replenishment by automatically making change of shuttles is shown in Figures 1 to 5 in the d 'awings, in which latter, Fig. 1 shows in front elevation portions of a loom and of a dobby mounted on the loom-frame, with the said embodiment of the invention applied thereto. The middle portion of the width of the loom, and the upper part of the dobby, are brokenaway to save space, and the usual weaving instrumentalities and the greater part of the replenishing instrumentalities are omitted. Fig. 1 shows in side elevation certain of the parts at the driving side of the loom, more particularly the shipperhandle and the means for throwing the same for the purpose of unshipping the driving power of the loom. Fig. 1 is a detail View showing portions of the weft-hammers at opposite sides of the loom, and the actuating cams for the said weft-hammers. Fig. 2 shows in side elevation the parts which are shown in Fig. 1. Fig. 3 shows in plan, on an enlarged scale, the breast-beam (part of the length thereof being broken out), and the parts which are mounted thereon and more immediately adjacent the same. Fig. 4 is a view in vertical section in the plane of the dotted lines t, 4, of Figs. 1 and 3, looking from right to left in the latter figures. Fig. 5 is a view in vertical section in the plane of the dotted line 5, 5, of Fig. 3, looking from right to left in Fig. 3. Fig. 6 is a detail view in side elevation showing a modification. Fig. 7 shows another modification. Fig.8 shows the weft-hammer cams of Fig. 7.

Having reference to the drawings, the side-frames of a loom are shown at 1, 1, the breast-beam at 2, the crank-shaft at 3, and the cam-shaft at 4. At 5 is part of the frame of a dobby mounted in elevated position upon the loom-frame, as usual. The drawings show, also, the rock-shaft 6 of the dobby provided with an arm 7 which is linked by a connection 8 to the crank-pin 5) carried by the disk 10on the projecting end of the cam-shaft 4, so that as a result of the rotation of the said cam-shaft a rocking or oscillatory movement is communicated to the rock-shaft 6 for the actuation of the usual upper and lower knives or lifters. These last are not shown, but in practice are arranged to operate by engagement with the usual hooks, to transmit movement to the harnessframes through the parts with which the said hooks are combined and by which the hooks are connected with the harness-frames, for the purpose of moving the latter in forming the successive sheds in the warpthreads. The construction of the dobby mechanism is well-known and forms no part of the invention. I have not shown the details thereof, nor the harness-frames and their connection with the parts of the dobby, these being familiar to those skilled .in the art. The pattern-cylinder of the dobby is shown at 11, Fig. 2, and a patternchain passing around the same is shown at 12, Figs. 1 and 2. Thesaid pattern-cylinder is actuated in usual manner for the purpose of feeding the pattern-chain step by step so as to present the successive lines of pegs or other indicators to the fingers or pattern-levers (of well-known character and not necessary to be shown) by which the engagement of the hooks of the dobby with the knives or lifters of the latter is controlled. The actuating devices for the pattern-cylinder comprise in this instance the worm-wheel 13, Fig. 2, loose on the shaft 11 of the pattern-cylinder, a yielding clutchdevice which will be referred to further presently and by means of which the said worm-wheel is combined with the said shaft so as to cause the latter and the patterncylinder and pattern-chain to move when a movement of rotation is communicated to the worm-wheel, a worm 14: the threaded portion of which engages with the teeth of the said worm-gear, a rotating shaft 15 on which the said worm is fixed, a sprocketwheel 16 fixed on the said shaft 14, and a 'sproeket-wheel 1S fixed on the crank-shaft 3. Each bar of the pattern-chain carries a single line of pegs or pins, and the devices described are arranged to advance thepattern-chain from one bar and its line of indicators to the next at every revolution of the said crank-shaft. In other words, the pattern-chain is advanced the distance between one line of indicators and the next for every pick of the loom, the dobby being therefore what will be recognized as what is termed in the art a single-index dobby. In some cases, other forms of shedding mechanism employing pattern-chains or other pattern-carriers having successive lines of pattern-indicators may be employed instead. The construction of the dobby or other form of shedding mechanism, and the precise character of the means for driving the pattern-cylinder thereof in effecting feed movements of the pattern-chain, or, broadly, of the pattern-surface, may be varied as desired.

The yielding clutch-device to which ref erence is made above is or may be the same as that which usually is employed in the like connection. The illustrated construction thereof is as follows :A notch in one side of the wheel 13 receives a laterally projecting portion of an arm or lever 13 which is pivoted at 13 upon a fixture in connection with the shaft 11 the said arm or lever being pressed toward the wormwheel 13 by means of an expanding spiral spring 13 which is confined between the back of the arm or lever and a collar 13 that is set-screwed on the shaft 11 Ordinarily, the yielding clutch-device combines the worm-wheel with the shaft 11 so that when the worm-wheel is turned it carries around with it the shaft 11 the patterncylinder, and the pattern-chain. If, however, the shaft 11 and pattern-cylinder are held positively from turning, the wormwheel will make its movement independently of the shaft and pattern-cylinder, the engaging portion of the arm or lever 13 slipping out of the notch or indentation into which it fits, but passing into another similar notch or indentation in connection with the wormwheel at the end of its ad vancing movement. Whenever necessary, in practice, the weaver is able to turn the patterncylinder and its shaft independently of the worm-wheel by taking hold by hand of the hand-wheel 11 (shown in Fig. 2 but omitted from Fig. 1) at the front end of the shaft 11, the yielding clutch-device permitting the said parts to be turned, although the worm-wheel itself is held from turning through the engagement of its teeth with the thread or threads of the worm 14. This capacity of the pattern-cylinder to turn independently with relation to the devices by which it is regularly actuated to feed the pattern-chain, and to be held from rotating when the said devices act, is utilized by me in carrying my invention into effect.

As hereinbefore stated, I employ devices for detecting weft-absence which are constructed to detect for picks in the opposite directions across the loom. The character and arrangement of the said devices may vary in practice. Herein, two weftforks 20 and 21, are employed, the former being located at the driving side of the loom and feeling for the picks of weft from the replenishing side of the loom, and the other thereof being located at the magazine or replenishing side and feeling for picks of weft from the driving side of the loom.

Each is hung pivotally upon a carriage or slide 22 mounted in a guide 23 upon the breast-beam 2 and movable therein in the direction from front to rear in the loom. lVith the said weft-forks cooperate wefthammers or goose-necks 241, 25, of usual character, actuated by means of cams on the said cam-shaft. The weft-fork 20 is in control of the replenishing instrumentalities, and is a means of calling them into action. Herein, as in my patent aforesaid, it also is combined with devices for stopping the loom for the performance of the replenishing operation. In addition, it is combined herein with the pick-finding or pick-matching devices. The weft-fork 21 is utilized in Figs. 1 to 5 solely in connection or combination with the pick-finding or pick-matching devices. In Fig. 7 it also serves, like weft-fork 20, to control the replenishing instrumentalities and stopping devices.

Unshipping of the driving power from the weaving instrumentalities, and stoppage of the weaving action, are brought about, and the replenishing instrumentalities are called into action, when the tail of the weftfork 20 is engaged by the head of the wefthaminer or goose-neck 24 and the side 22 of the said weft-fork is moved forward in its guideway 23. The adjustable screwthreaded regulating link 28 carried by the I tion or pin 29 on an upright arm 30, the' latter being fixed by its lower end upon a transverse rockshaft 31 supported in bearings below the breastbeam, at the front of the latter. The said rockshaft has fixed upon one end thereof (see Fig. 1 a lug 32 which, through its engagement with a lug 33 on the hub-portion of the shipperhandle 34 acts, when the rockshaft 31 is rocked forwardly in consequence of the forward movement of the slide of weft-fork 20, to turn the shipper-handle so that the latter is shifted rearward. The power-ship ping and brake-devices thereby are caused to be actuated so as to unship the driving power and apply the brake and thus arrest .the movement of the working parts of the loom proper, all substantially as in my United States Letters Patent No. 945,722, aforesaid. By way of making clear one mode of combining my invention with automatic means for replenishing the working weft-supply, I have shown certain of the parts of the replenishing mechanism of said Letters Patent. At 35, F 1 and 2, is the hopper mounted upon the loom-frame adjacent the end of the breast-beam opposite that at which the shipper-handle is located, and designed to hold filled shuttles in readiness for being transferred successively to the lay. The devices for effecting the transfer may be as in the said Letters Patent. In order to enable the replenishing instrumentalities to be tripped into action, an arm 36 is hung loosely upon rockshaft 31, it being free to turn without turning the said roekshaft. It is provided with a finger 37 from which a flexible connection 38 extends to the latching lever 39 of the clutch of the so-called change-shaft 40. The said latch through its engagement with the fixed stop 41, Fig. 1, with which it is held in engagement by a contracting spiral spring 42, is caused to retain the disengaging lever 43 of the change-shaft clutch 44 in' position to hold the said clutch open so that the change-shaft normally remains disconnected from its driving mechanism. To cause the said instrumentalities to be tripped into action at the same time that the weaving action of the loom is stopped, a dog 45 is hung upon a pin 46 projecting from the outer side of arm 30, the working end of such dog being adapted to engage with a shoulder on the upper end of the arm 36.

When the weft-hammer 24 in its forward movement engages with the tail of the weftfork 20 and moves the carriage or slide of the said weft-fork forward, swinging for ward the arm 30, the rocking movement of arm 36 produced through the engagement of the dog 45 with the shoulder of the arm 36 will operate, through the movement thereby imparted to the finger 37, to disengage the latch 39 from the fixed projection 41, and permit the disengaging lever 43 to yield so as to allow the clutch at 44 to become operative in connecting the change-shaft 40 with its driving mechanism.

Thereby the said change-shaft is set in rotation and by means of the cams thereon, and intermediate connections, actuates the replenishing instrumentalities to effect the replenishment during the standstill of the loom, one of the cams on the said changeshaft acting on the completion of the replenishing operation to automatically restart the loom, the change-shaft thereupon becoming unclutched from its driving mechanism, after which it stands at rest, with the loom in operation until weft-absence is again detected.

The pick-finding or piclomatching devices, and the manner in which they are placed under the control of the weft-detecting devices at the two sides of the loom, will now be described.

A toothed wheel 50, here shown as a ratchet-wheel, is fixed upon one end of the shaft 11 of the pattern-cylinder. A dog or pawl 51 adapted to engage by its working end with the teeth of the wheel is pivoted at 52 to an upwardly-extending arm 53 fixed upon a rock'shaft- 54 extending transversely of the dobby and mounted in hearings in the frame thereof. A second arm 55 fixed on the said roekshaft 54, shown by dotted lines in Fig. 1, has connected pivotally therewith the upper end of a rod 56, which at its lower end has fixed thereto the yoke 57, the slotted portion of which straddles the cam-shaft 4, a shoulder of the said yoke resting on the cam 58 which is set-screwed to the cam-shaft. This cam is shaped, as shown, so that through the devices described it advances the dog or pawl at one pick of the loom, causing it to pause or dwell slightly in its fully advanced position, and then retracts the dog or pawl, causing a pause or dwell of the same in its retracted position for one revolution of the crankshaft. A movable support or rest for the dog or pawl is combined with the latter, such support or rest consisting of an arm 59 carrying a pin 60 working in a slot 61 in the dog or pawl, the said arm 59 forming part of a lever which is hung on the roekshaft 54 with capacity to turn thereon. The other arm, 59, of the said lever has combined therewith means for controlling the position of the pawl-rest and thereby the engagement of the dog or pawl 51 with the wheel 50 fixed on the shaft of the pattern-cylinder. The cam-slot 61 is so shaped that when the pawl-rest occupies its highest position shown in Fig. 1, the engaging portion of the dog or pawl occupies a position close to the periphery of the toothed wheel 50, but out of engagement with the teeth of the latter, and as the roekshaft 54 rocks or oscillates the said working end of the dog or pawl plays back and forth in a short pat that is substantially concentric with the said periphery of the wheel 50. The rest 59 is operatively combined through intermediate connections with a pick-finder lever 61 so as to be controlled by the latter. The said pick-finder lever 61 is mounted loosely upon the shaft 31 at the replenishing side of the loom, it having a depending arm composed in part of an adjustable piece 62, the latter carrying a pin 63 working in a slot 64 in the front end of a connecting rod or link 65, the rear end of the latter being pivotally connected with the depending arm of a bell-crank 66, which latter is pivoted at 67 to a small bracket 68 on the loomframe. The rearwardly extending arm of the said bell-crank is connected pivotally with the lower end of a rod 69 which extends upward and at its upper end passes through a hole in the free extremity of the inwardly-extending arm 59 of the pawlrest. The said upper end of the rod 69 carries a collar or the like, 70, for engagement with the upper side of the said arm 59. The said collar, for convenience in adjusting the normal position of the pawl-rest, is made as a nut which screws upon the screw-threaded upper end of the rod 69. The pawl-rest is held in its normal elevated position through the action of a contracting spiral spring, 71, having one extremity thereof engaged with a fixed lug on the front of the loom-frame, and the other extremity thereof engaged with a forwardly-projecting lug forming a portion of the piece 62 of the depending arm of the pick-finder lever 61. The said spring acts wit-h a tendency to swing the said arm forwardly, 2'. 6., toward the left in Fig. 2, and cause its pin 63 to engage with the front end-wall of slot 64 in connecting rod or link 65, so as through the connections 63, 65, 66, 69 and 70, to draw down the arm 59 and thereby raise the pawl-rest and pawl or dog 51. The extent of the swinging movement of the bell-crank 66 is limited through the contact of the horizontal arm of the same with upper and lower fixed stops 68 68", on bracket 68. The height of the pawl-rest under the action of spring 71, and consequently of the pawl or dog 51 with relation to the periphery of the wheel 50 on the shaft of the pattern-cylinder, is regulated by adjustment of the collar 70 on the connectingrod 69. The adjustable part 62 of the depending arm of the pick-finder lever is pivoted at 62 Fig. 5, to the fixed part of such arm, and is slotted at 62 con centrically with the pivot for the reception of a threaded pin or bolt 62. A clamping nut 62 on said pin or bolt clamps the piece 62 in adjusted position. This construction provides for the'convenient setting of the parts in assembling and combining them in a loom.

The pick-finder lever 61 is controlled by means of the weft-detecting devices or feelers at the respective sides of the loom. For the purposes of its actuation by the weftfork or feeler 20 at the driving side of the loom, its upwardly extending arm is arranged to be engaged and pushed forward by a lateral projection 72 of an upright finger or dog 7 3 fixed on the right hand end of the shaft 81. Consequently, when weftabsence is detected on the pick of the shuttle from the replenishing side of the loom to the driving side of the latter, and the wefthammer 24 through its engagement with the tail of the weft-fork 20 operates to move forward the slide or carriage 22 of the said weft-fork, swinging the arm 30 forward and thereby rocking the shaft 31, this rocking of the said shaft carries the finger or dog 73 forward. The lateral extension or projection 72 of the latter presses forward the upper arm of the pick-finding lever 61, turning the said pick-finder lever so as to move the pin 63 rearward and permit the rod 69 and its stop-collar 70 to be raised, through the action of a spring 77, so as to lower the dog or pawl 51 into position to engage with the teeth of the wheel 50 on the shaft of the pattern-cylinder. Spring 7 7 is a contracting spiral spring having one extremity thereof connected with the arm 59 of the pawl-rest, and the other extremity thereof connected with a fixed point of the dobby framework. It is weaker than the spring 71, so that normally the superior tension of the said spring 71 enables it to overpower the spring 77 and draw down the arm 59 of the pawl-rest, so as to raise the latter into its normal position and keep it there, holding the dog or pawl 51 out of engagement with the teeth of the wheel 50. When, however, the pick-finding lever 61 is rocked as just described, so as to carry the pin 63 rearward, the spring 77 is permitted to act so as to move the pawl-rest. For the purposes of the actuation of the pick-finder lever 61 by the weftfork or feeler 21 at the replenishing side of the loom the upwardly extending arm of the pick-finder lever is arranged to be engaged and pushed forward by a dog 78 that is hung at 79 to an arm 80 which in Figs. 1 to 6 is loosely mounted on the right hand portion of the rockshaft 31. A pin 81, project ing from the said arm 80 oppositely with relation to the pin 7 9, is connected by an ad justable screw-threaded regulating link 82 with the slide or carriage 22 of the said weft-fork 21, so that when the said slide or carriage, on the occurrence of weftabsence on a pick from the driving side of the loom to the replenishing side of the latter, is moved forward in the loom as a result of the engagement of the weft-hammer 25 with the tail of the said weft-fork, the arm 80 and dog 78 are moved forward also. Thereby the said dog is caused, through its engagement with a shoulder at the upper end. of the arm of the pick-finder lever 61, to turn the pick-finder lever in manner to bring about the shifting of the pawl-rest which permits engagement of the dog or pawl 51 with the teeth of the wheel 50 on the shaft of the pattern-cylinder.

Let it be assumed that, in the working of a loom having an embodiment of the invention applied thereto, a pick of the shuttle takes place from the replenishing side of the loom toward the driving side thereof, through a shed in the warps indicated by the line of pattern-indicators of one of the bars of the pattern-chain. Just prior to this pick, the pattern-cylinder is turned one step so as to shift that line of indicators out of engagement with the pattern-fingers, and to present the next succeeding line of indicators for use in indicating the formation of the next shed in the warp. Let it be assumed, also, that a failure of weft takes place in the case of this second pick, so that there is no weft extending through the shed to be carried against the tines of the weft fork 20 at the driving side of the loom when the lay beats up. Accordingly, as wefthammer 24 moves forward it will engage the tail of the weft-fork 20 and move the slide or carriage 22 of the latter forward, thereby rocking the rockshaft 31 to effect the unshipping of the power and stopping of the loom, and moving the pick-finder lever 61 so as to allow spring 77 to operate the pawlrest to allow the dog or pawl 51 to engage with the toothed wheel 50 on the shaft 11 of the pattern-cylinder. Meantime the lay has swung rearwardly and the shuttle been picked from the driving side of the loom back to the replenishing side thereof, through the shed in the warps indicated for by the second line of indicators of the pattern-chain. By this time, the momentum of the moving parts of the loom having been overcome, the loom will come to rest with the shuttle in the shuttle-box at the replenishing side and the replenishment will be effected by the replenishing instrumentalities, the latter having been called into action by means of the arm 79 and other parts hereinbefore explained. The engagement of the dog or pawl with the toothed wheel 50 takes place just prior to the time for the advance of the patterncylinder and pattern-chain which is concurrent with the pick from the driving side to the replenishing side, the yielding clutch giving way so that the worm-wheel 13 of the pattern-cylinder is permitted to turn without any turning movement being communicated to the pattern-cylinder. In order that the pattern-cylinder and patternchain may be turned backward to the required extent to bring again under the pattern-fingers the line of pattern-indicators for the shed in which weft-absence occurred, the cam 58 on the cam-shaft, acting through the yoke 57 and rod 56, rocks the rockshaft 54 so as through the dog or pawl 51 to reverse the pattern-cylinder and pattern-chain the distance betweenrone line of indicators and the preceding line. The effect of these actions is to effect a relative readjustment to the extent of two lines of indicators of the pattern-chain, presenting again in position to act upon the pattern-fingers of the dobby the line of indicators for the shed in which failure of weft occurred. Consequently, when the loom is restarted on the completion of the replenishing operation, the said shed is reopened to receive the first pick of the fresh weft. In case weftabsence should occur on the pick from the driving side to the replenishing side of the loom, so that the weft-fork 21. at the latter side is not tilted when the lay heats up, the engagement of the weft-hammer 25 with the tail of the weft-fork 21 will cause the carriage or slide 22 of such weft-fork to be moved forward, swinging forward the arm 80 so that the dog 7 8 engages and actuates the pick-finder lever 61, turning the lattei so as to permit the pawl-rest to be moved by spring 77 to bring about engagement of the dog or pawl 51 with the toothed wheel 50 of the pattern-cylinder. The extent of the turning movement of the pick-finder lever is greater than is required to lower the dog or pawl into engagement with the said wheel. During the excess-portion of such movement the pin 63 moves idly rearward within slot 64 of connecting-rod or link 65. Before the said engagement of the dog or pawl takes place, however, the pattern-cylinder has been advanced to present to the pattern-fingers the line of indicators of the pattern-chain for the shed next succeeding that in which the failure occurred. Such shed having been opened, a pick now takes place from the replenishing side to the driving side, no weft being laid in the newly opened shed. At this time an advance of the pattern-cylinder and pattern-chain would take place in the regular working of the loom but the dog or pawl 51 acts to hold them from being advanced. The lay beating-up, and there being no weft to tilt the fork 20 at the driving side of the loom, the devices in connection therewith act to rock the shaft 31, the latter operating the knocking-off devices to arrest the weaving action and call the replenishing instrumentalities into operation, and in addition acting through its dog 7 8 to engage the pick-finder lever, which at this time is returning to its normal position under the action of spring 70. Thereby, before pin 63 engages the front wall of slot (5 1, and acts to draw forward the connecting rod or link 65 so as to raise the pawl-rest 59 and the dog or pawl 51, the pick-finder lever is again turned to carry pin 63 rearward, so that the dog or pawl 51 shall be permitted to remain in engagement with the wheel 50 on the shaft 11 of the pattern-cylinder, and thus the advance of the pattern-cylinder and patternchain which otherwise would occur at this time, are prevented. Before the parts of the loom come to rest,'the final momentum thereof occasions the pick of the shuttle back from the driving side to the replenishing side, and the actuation of the dog or pawl 51 by means of cam 58, turns backward the pattern-cylinder and pattern-chain so 115 as to present to the pattern-fingers the line of pattern-indicators for the shed in which weft-absence occurred, in readiness to occasion a reopening of such shed for the reception of the first pick of fresh weft'l20 after the loom is restarted.

It will be observed that the devices at the respective sides of the loom have a differential action, those at the driving side acting, in case weft-absence occurs on the pick from 125 the replenishing side of the driving side, to stop the cylinder and pattern-chain from turning at one pick, and turning them back one step, while, when the weft-absence occurs on the pick fromthe driving side to 3 the replenishing side the devices at the latter side act to occasion an additional or preliminary arrest of the pattern-chain and pattern-cylinder for one pick.

The parts are so contrived that the shed in which weft-absence occurred shall always be opened for the first pick of the replenished weft which takes place from the replenishing side of the loom. The stopping devices are caused to operate so that the loom always is stopped with the shuttle at the replenishing side thereof. It will be obvious that substantially the same weft-detection, stopping and pick-finder arrangements might be employed in a non-replenishing loom arranged to stop with the shuttle always at the same side of the loom, the replenishment and restarting being effected manually. The pick-finder arrangements are not necessarily restricted to employment in looms in which the weaving action is arrested for the performance of the replenishing operation, but may readily be applied to looms in which the replenishment is effected without arrest of such action.

For the arrest of the taking-up of the woven cloth when weft-failure occurs, a rockshaft 90 is mounted in bearings at the front of the loom at the driving side of the latter. The said rockshaft has fixed on its inner end an upwardly-extending arm 91 carrying a laterally-extending pin or projection 92 that extends in front of arm 36. WVhen arm 36 is rocked forwardly in consequence of the forward movement of slide or carriage 22 of weft-fork 21 the rockshaft is' caused to turn in its bearings. The turning movement of rockshaft90 operates through an arm 93 fixed on its outer end, and a link 94 joined to the said arm, to disconnect the taking up devices in well-known manner and thereby cause the arrest of the taking up action, and letting-back of the woven cloth, as usual.

As a means of insuring against accidents, such as might happen in the case of an automatic weft-replenishing loom employing a continuously running change-shaft in consequence of the weaver inadvertently tripping the change-shaft into action while engaged in making adjustments, or in repairing warp or web, after having stopped the loom by hand by throwing off the shipperhandle, I pivot the dog 45 upon the pin or projection 46 carried by arm 30, as aforesaid, and provide it with a finger 45 adapted to be engaged by a finger 45 on the rock shaft 34 of the shipper-handle 34. When the shipper-handle occupies its position shown in Figs. 1 3 and 4, in which the power is on and the weaving instrumentalities at work, the finger 46 is retracted clear of the finger 45, leaving the dog 45 free to occupy its normal posit-ion in readiness to engage the shoulder of the arm 36. WVhen,

however, the shipper-handle is swung rearwardly from its position in the said figures,

throwing-off the driving-power, the turning 1 of the rockshaft 34 carries finger 46 forward and upward into engagement with finger 45 so as to move such finger and the dog 45 in manner to raise the engaging portion of the dog above the shoulder of arm 36. The dog is retained in elevated position so long as the shipper-handle remains thrown. Consequently, in case the weaver in turning over the loom should bring about an advance of slide 22 of weft-fork 20, the dog 45 in advancing would pass over the shoulder of arm 36 without engaging therewith, and the advancing movement of the dog would have no elfect in restarting the loom and no harm would result. When the shipperhandle is restored to its position shown in the drawings, the withdrawal of finger 46 from engagement with finger 45 permits dog 45 to resume its normal working position.

The stoppage of the weaving mechanism for the replenishing operation takes place with the lay at back center, immediately after the pick of the shuttle from the driving side of the loom toward the replenishing side, this pick leaving no weft in the shed. After replenishment and the restarting of the weaving mechanism the lay advances to front center. At front center the weft-hammer 25 acts and as no weft is present in the shed to tilt the weft-fork 21 the tail of such fork is engaged by the said weft-hammer, and the slide or carriage 22 of such weft-fork is advanced toward the front of the loom as a result of such engagement. This would result in undesirably operating the pick-finder devices to prevent one advance of the pattern-chain if means were not provided to obviate such action. I provide means for rendering the weft-fork devices at the replenishing side of the loom ineffective on this pick to operate the pickfinder devices, a convenient form thereof being shown in the drawings. In the latter, the dog 78 is pivoted as already described, upon pin or projection 7 9 carried by arm 80. A finger 7 8 extending from such dog has pivotally joined thereto the upper end of a link or connectingrod 95, Figs. 1, 5 and 6, the lower end of which is joined pivotally to a lever 96, the latter resting by its downturned rear end upon the periphery of a cam 97 fixed on change-shaft 40. During the rotation of the change-shaft 40, occurring while the weaving mechanism stands still, the said cam acts through the lever and link or connecting-rod to swing the dog 78 upon its pivot 7 9 so as to raise its engaging end above the shoulder of the upper arm of the pick-finder. At the time when the weaving mechanism is restarted the dog is held thus raised; Consequently, when the weft-hammer 25 makes its first stroke aforesaid, engaging the tail of weft-fork 21 and moving its slide or carriage 22 and the arm 80 and dog 78 forward, the dog simply passes above the said shoulder and the pick-finder lever is not moved. The change-shaft continues in motion for a short period after the restarting of the weaving mechanism, and the last portion of its rotation acts to carry the cam 96 around into the position occupied by it in Fig. 6, permitting lever 96 to drop so as to lower the dog 78 into its working position.

It has been indicated in the course of the foregoing description that when weft-failure occurs in the pick of the shuttle from the driving side of the loom to the replenishing side thereof, the weft-detector devices at the latter side act to move the pick-finder lever to carry its pin or projection 63 rearward so as to release the pawl-rest 59, 60, to the action of the spring 77, so that such spring may move the pawl-rest to allow the dog or pawl 51 to engage with the toothed wheel 50 on the shaft of the pattern-cylinder 11 for the purpose of preventing one advance of the pattern-chain. It has furthen been indicated that after the return pick from the replenishing side of the loom to the driving side thereof the weft-detector devices at the latter side also act in connection with the pick-finder lever to permit the said spring 77 to cause the pawl-rest and dog or pawl to occupy positions enabling the dog or pawl to prevent the ensuing advance of the pattern-chain and then to turn the pattern-cylinder and pattern-chain back one line of pattern-indicators. To obviate idle play of the pawl-rest and dog or pawl up and down between the described action of the weft-detector devices at the replenishing side of the loom and that of the weft-cletector devices at the driving side, the slot 641 is made long enough to permit considerable lost motion -to take place in the movement of pin or projection 63 back and forth therein, and the cam 27 is constructed so that it shall produce movement of the pin or projection 63 rearward in slot 64 of link 65 to an extent in excess of the amount actually necessary for permitting the pawl-rest to be moved to effect the engagement of the dog or pawl 51 with the toothed wheel 50, and such cam also being so arranged with relation to cam 26 that before the said pin or projection in its return forward stroke permitted by cam 27 reengages with the front end-wall of slot 64 the weft-detector devices at the driving side of the loom take control of the pick-finding lever and by communicating a second'swinging movement thereto carry the pin or projection 63 rearward again. Meantime, the pawl-rest and dog or pawl remain in lowered position, with the acting end of the dog or pawl in continuous engagement with the toothed wheel 50, Another means of preventing idle up and down movement of the pawl-rest 59, 60,- and dog or pawl 51, is shown in Fig. 6, in which the upper arm of pick-finder lever 61 carries a pin 61, and a latch 61. is conveniently pivoted in position for engagement with the said pin in the forward position of the said upper arm. When the dog 78 in advancing acts to swing the pick-finder lever so as to carry its upper arm forward, thereby providing for the movement of the pawl-rest which permits the dog or pawl 51 to en age with the periphery of the toothed whee 50 on the shaft 11 of the pattern-cylinder, the engaging portion of latch 61 drops into engagement with pin 61, holding the pickfinder lever in the position which has been given to it. The forward movement of finger 7 8 of dog 78, produced through the action of cam 97 on change-shaft 40, provides for the disengagement of latch 61 from the pin 61 so as to release the pick-finder lever. To this end a pin 61 is applied to the latch in such position that as the finger 78 is swung forward the pin is struck thereby, so that thus the latch is lifted.

In the construction shown in Figs. 7 and 8 the pick-finder lever is fixed upon the rockshaft 31, and the finger or dog 73 with its projection 72 is omitted. Each set of weft-detector devices is operative to rock the said rockshaft and thereby bring about the stoppage of the loom-mechanism and call the replenishing instrumentalities into action. In order that the loom may be stopped with the shuttle in the shuttle-box at the replenishing side thereof when weft failure is detected on the pick from the driving side of the loom toward the replenishing side, the cam 27 which actuates wefthammer 25 at the replenishing side isconstructed as shown best in Fig. 8. The portion of such cam from a to 1) causes an advance of the upper end of the said wefthammer to take hold of the tail of the weft-fork 21. The portion from b to 0 causes the weft-hammer to dwell in its partly advanced position, holding on to the said tail. The portion from c to (Z acts as the lay arrives at front center following the pick from the replenishing side, and consequently the loom is arrested with the lay at back center following the return pick to the replenishing side. This construction has the advantage that the detecting action of the weft-fork mechanism is less liable to be interfered with by a trailing end of weft hanging from the working shuttle. If such end is long enough so that it will clear the weft-fork 21 at the replenishing side of the loom, and allow detecting action to take place at such side, the stoppage of the loom and replenishing action will be brought about, even though on the pick from the replenishing side to the driving side of the loom the trailing end should lie across the tines of the weft fork 20 at the driving side. I claim as my invention:

1. In a weft-replenishing loom, the combination with detecting devices operative to detect weft-absence for picks in both directions, weft-replenishing instrumentalities controlled by the said devices, effecting replenishment at one side of the loom, a shedding mechanism employing a pattern-carrier having successive lines of pattern-indicators, and pick-finder devices controlling the said shedding mechanism to reopen for the first pick following replenishment the shed in which weft-absence first occurred in whichever direction of pick the said weftabsence occurred.

2. In a loom, in combination, detecting devices operative to detect weft-absence for picks in both directions, loom-stopping devices which bring the weaving instrumen-- talities to rest with the shuttle always at the same side of the loom, a shedding mechanism employing a pattern-carrier having successive lines of patteri'i-indicators, and pickfinder devices controlling the said shedding mechanism to reopen for the first pick after restarting the shed in which weft-absence first occurred.

3. In a loom, in combination, a shedding mechanism employing a pattern-carrier having successive lines of pattern-indicators, and differential resetting devices for the said pattern-carrier, and weft-detecting devices for the picks in opposite directions operatively combined with the said differential resetting devices and controlling the latter to cause the shed in which failure of weft occurred in either direction of pick to be re opened, always for a pick from the same side of the loom.

4. In a weftreplenishing loom, the combi nation with detecting-devices operative to detect weft-absence for picks in both directions, weft-replenishing instrumentalities controlled by the said devices, effecting replenishment at one side of the loom, a singleindex dobby, and pick-finder devices controlled by the said detecting devices and controlling the said dobby to reopen for the first pick following replenishment after weftfailure in either direction of pick the shed in which weft-absence first occurred.

5. In a loom, in combination, detectingdevices operative to detect weft-absence for picks in both directions, loom-stopping devices which bring the weaving instrumentalities to rest with the shuttle always at the same side of the loom, a single-index dobby, and pick-finder devices controlled by the said detecting devices and controlling the said dobby to reopen for the first pick after restarting the shed in which weft-absence first occurred in a pick in either direction.

6. In a loom, in combination, a single index dobby, differential resetting devices for the pattern-surface of the said dobby, and weft-detecting devices for the picks in opposite directions operatively combined with the said differential resetting devices and controlling the latter to cause the shed in which failure of weft occurred in either direction of pick to be reopened, always for a pick from the same side of the loom.

7. In a loom, in combination, a singleindeX dobby having a pattern-cylinder and means for imparting forward feed-movements thereto, a toothed wheel operatively combined with the said cylinder and a reciprocating pawl adapted to engage with said toothed wheel and weft-detector devices and mechanism operatively combined therewith controlling the engagement of the said pawl with the said toothed Wheel and thereby in case weft-absence occurs in the pick in one direction readjusting' the pattern-cylinder to the extent of the number of lines of pattern-indicators to produce a reopening of the shed corresponding with such pick, and in case weftabsence occurs in the pick in the other direction readjust-ing the pattern-cylinder to the extent of the number of lines of pattern-indicators to produce a reopening of the shed corresponding with the pick in such case.

8. In a loom, in combination, a singleindex dobby having a pattern-cylinder and means for imparting forward feed-movements thereto, a toothed wheel cperatively combined with the said cylinder and a reciprocating pawl adapted to engage with said toothed wheel, and weft-detector devices and mechanism operatively combined therewith controlling the engagement of the said pawl with the said toothed wheel and there by in case weft-absence occurs in the pick in one direction suppressing one feed-movement and reversing to the extent of the previous feed-movement, and in case weftabsence occurs in the pick in the other direction suppressing two successive feed-movements and reversing to the extent of the previous feed-movement, thereby effecting a differential resetting of the pattern.

9. In a loom, in combination, shedding mechanism employing a pattern-carrier having successive lines of pattern-indicators, differential resetting devices for the said pattern-carrier, weft-replenishing instrumentalities effecting replenishment at one side of the loom, and weft-detecting devices for the picks in opposite directions, controlling the time of action of the said instrumentalities, and operatively combined with the said differential resetting devices and controlling the latter to cause the shed in which failure of weft occurred in either direction of pick to be reopened, always for a pick from the said side of the loom.

ion

10. In a loom, in combination, shedding mechanism employing a pattern-carrier having successive lines of pattern-indicators, differential resetting devices for the said pattern-carrier, loom stopping devices which bring the weaving instrumentalities to rest with the shuttle always at the same side of the loom, and weft-detecting devices for the picks in opposite directions, controlling the said stopping devices, and operatively combined with the said differential resetting devices and controlling the latter to cause the shed in which failure of weft occurred in either direction of pick to be reopened, always for the pick from the said side of the loom.

11. In a loom, in combination, shedding mechanism employing a pattern-carrier having successive lines of pattern-indicators, differential resetting devices for the said pattern-carrier, loom stopping devices which bring the weaving instrumentalities to rest with the shuttle always at the same side of the loom, weft-replenishing instrumentalities effecting replenishment at such side of the loom, during the stoppage, means for automatically restarting the loom after the replenishment, and weft-detecting devices for the picks in opposite directions, controlling the said stopping devices and replenishing instrumentalities, operatively combined with the said differential resetting devices, and controlling the latter to cause the shed in which failure of weft occurred in either direction of pick to be reopened, always for a pick from the said side of the loom.

12. In a loom, in combination, detecting devices operative to detect weft-absence for picks in both directions, loom-stopping devices which bring the weaving instrumentalities to rest with the shuttle always at the same side of the loom, weft-replenishing instrumentalities controlled by the said detecting devices effecting replenishment at the said side of the loom, shedding mechanism employing a pattern-carrier having successive lines of pattern-indicators, means for restarting the said weaving instrumentalities after replenishment, and pick-finder devices controlling the said shedding mechanism to reopen, for the first pick after replenishment and restarting, the shed in which weft-absence first occurred.

13. In a weft-replenishing loom, in combination, detecting devices operative to detect weft-absence for picks in both directions, loom-stopping devices which bring the weaving instrumentalities to rest with the shuttle always at the same side of the loom, weftreplenishing instrumentalities controlled by the said detecting devices effecting replenishment at such side of the loom during the rest of the weaving instrumentalities, means for restarting the weaving instrumentalities after replenishment, a single-index dohby,

and pick-finder devices controlled by the said detecting devices and controlling the said dobby to reopen for the first pick following replenislnnent, after weft-failure in either direction of pick, the shed in which weft-absence first occurred.

14. In a loom, in combination, a patternmechanism employing a rotating patterncarrier having successive lines of patternindicators, a toothed wheel in connection with said pattern-carrier, a dog or awl for engagement with said toothed whee means for actuating said pawl, a pawl-controller normally holding said dog or pawl out of engagement, weft-detecting devices detecting for picks in opposite directions, and differential devices actuated selectively by the -said weft-detector devices, connecting with said pawl-controller to cause said dog or pawl to reset the pattern-carrier and pattern-chain to reopen the shed in which weftabsence occurred in case of failure of the pick in either direction.

15. In a 100m, in combination, patternmechanism employing a rotating patterncarrier having successive lines of pattern-indicators, a toothed wheel in connection with said pattern carrier, a dog or pawl for engagement with said toothed wheel, means for actuating said pawl, a pawLcontroller normally holding said dog or pawl out of engagement, weft-detector devices detecting for picks in opposite directions, means through which in case of weft-absence first occurring in the pick in one direction the pawl-controller is operated to render the dog or pawl operative to engage said wheel and reset the pattern-carrier and patternchain the required number of lines of pattern-indicators to reopen the shed in which such weft-absence occurred, and means acting through the pawl-controller in case of weft-absence first occurring in the pick in the other direction to render the dog or pawl operative to reset the pattern-carrier and pattern-chain the increased number of lines required to reopen the shed in which such weft-absence occurred.

16. In a weft-replenishing loom, in combination, a change-shaft controlling the replenishing instrumentalities, a weft-fork and weft-fork carrier at the replenishing side of the loom, a weft-hammer cooperating with such weft-fork, a dog actuated by the movement of the said weft-fork carrier, a member adapted to be engaged and operated by the said dog, and means operated by the said change-shaft for rendering the dog ineffective to engage and move the said member in first operating after replenishment.

17. In a weft-replenishing loom, in combination, a change-shaft which controls the action of the weft-replenishing instrumentalities and the loom-restarting devices, a weft-fork, weft-fork carrier, and weft-hammer at the replenishing side of the 100m, a said member by said dog When the Weaving" dog actuated by the said carrier, a member action is first restarted. 10 adapted to be engaged and moved by the said In testimony whereof I afiix my signature dog, means operated by the movement of in presence of tWO Witnesses.

said member to arrest the Weaving action SIMEON SCI-ICON JACKSON. and call the replenishing instrumentalities iVitnesses:

into action, and means operated by the EDITH A. WIsEMAN,

change-shaft for preventing actuation of NATHAN B. DAY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

